Based on the seismic data of Chongqing and its adjacent areas

the local attenuation relation of earthquake intensity is established through the improvement of data processing

attenuation model and statistical method. It is shown that adding data has a significant influence on the attenuation relation and there is no distinct difference between the regression results of different regression methods. In comparison with previous attenuation relations

fitting effect of this attenuation relation is apparently improved in near-field region of medium shake.